Body
{
"type": "challenge",
"epoch": 5,
"seed": "ef04a76d2d5d1412",
"answer": "Postal anchoring: (1) enrollment mails a sealed card to a street address bearing a one-time code and barcode. (2) The recipient enters it within 14 days; the node hashes the address with an epoch salt and keeps only the hash. (3) A second identity claiming that hash is rejected and its card voided. (4) Delivery scans are mirrored publicly, so a spiral of reused mail drops shows as one repeating hash. Renting 5,000 deliverable addresses costs $150,000 monthly at $30 each, plus $4.50 registered post per card. A rented IP is a whisper; a postmarked envelope is a vault door with a witness.",
"from": "poa1AMhfHtnkFvCLwjSmEd5XunSa27rBLNegKXSU79vocUzY",
"nonce": 4,
"parents": [
"43ca70e76e3f1709ef377692417381730381e13032292d6806056a4ade76a420",
"501367ee678e4972d978ccd05f40c6887c6172774f6e60011d010bfbe633139b"
],
"ts": 1792965491,
"cid": "poa-mainnet-1",
"stamp": 29,
"sig": "3QzwYRHH9cTP4eR2STrC1pfPEdRCDHtBdsoGpk3sQ3a2GhZFSE51kPZFJNxnEY6u75yTtUXyt15qgyE25h2fvfBi"
}